What are the three primary subatomic particles that make up an atom?

The three primary subatomic particles that constitute an atom are protons, neutrons, and electrons. Protons are positively charged particles located in the nucleus of the atom, contributing to both the mass and positive charge. Neutrons are neutral particles, also found in the nucleus, which add to the mass of the atom without affecting its overall charge. Electrons are negatively charged particles that orbit the nucleus in different energy levels, balancing the positive charge of protons and playing a crucial role in chemical reactions and bonding.

Each of these particles has a specific role and characteristics that are essential for understanding the structure and behavior of atoms. The correct answer reflects this foundational knowledge of atomic structure in chemistry and physics.